Flora of North America species comparison

erect, with multiple branches, rarely with 1 stem, to 70 cm.

erect, with 1 or more ascending branches from base, to 60 cm.

1–6 × 0.4–2 cm;

petiole 0–3 cm, distal ones sessile;

blade lanceolate or narrowly ovate, base round or truncate, margins sparsely denticulate, apex long-acuminate.

1–8 × 1.5–2 cm;

subsessile;

blade narrowly lanceolate-elliptic, base cuneate to truncate, basal often attenuate, margins denticulate, apex acute.

opening near sunrise;

floral tube (1.8–)2–3.8 mm;

sepals (1.5–)3.2–8.5 mm;

petals yellow, usually with 1 or 2 red dots basally, (2.5–)5–10.5 mm; episepalous filaments (1.2–)2.5–4.5 mm, epipetalous filaments (0.8–)1.5–2.5 mm, anthers (0.4–)0.8–1.5 mm, less than 5% of pollen grains 4- or 5-pored;

style (2.5–)4.5–7.5 mm, stigma surrounded by anthers at anthesis.

opening near sunrise;

floral tube 1.8–3.7 mm;

sepals 2.6–4.2 mm;

petals yellow, usually with 1 or 2 red dots basally, 3.2–7 mm; episepalous filaments 1.8–3 mm, epipetalous filaments 1–1.5 mm, anthers 0.8–3 mm, 70–100% of pollen grains 4-pored;

style 3–6.2 mm, stigma surrounded by anthers at anthesis.

straight or 1–2-coiled spiral, subterete in living material, 4-angled when dry, 13–23 × 0.9–1.2 mm.

usually 1-coiled spiral, 4-angled, 14–25 × 1.5–2 mm.

0.7–1.1 mm.

0.9–1.2 mm.

= 14.

= 42.